Plant for utilizing the sensible heat of hot coke



May 21, 1929. o, HELLER Y 1,714,168

PLANT FOR UTILIZING THE SENSIBLE HET OF HOT COKE Filed Sept. 29, 1924Patented May 2l, l1929.

UNITED STATES 1,714,168 PATENT OFFICE.

osWALn HELLnn, or HALENSEE, NEAR BERLIN, GERMANY.

:PLANT FR UTILIZING THE SENSlVBLE HEAT OF HOT COKE.

Application filed September 29, 1924, Serial No. 740,587, and in Germany`ilictober .3, 1923.'

`This invention relates to a plant for raising steam by means of heatobtained from vapours formed by quenching coke in a closed receptacle.It is already known to 5 pass these vapours into a heat exchanger orboiler containing clean water from which pure steam is thereby produced.

My invention consists in the improvements relating to the said boilerfor the efficient exchange of heat between the said vapours and cleanwater, as particularly set forth in the appended claim.

In the accompanying drawing, a plant embodying the invention is showndiagrammatically, by way of example.

The coke K contained in the movable rea iift no shown in the drawing andsuitably' arrange on the carriage 1a. After the cover 2* is closedgas-tight the coke is sprayed with water through the perforated pipe 2b,

steam containing sulphurous acid and waterl was being formed. To preventthe same from attacking vthe interior of the chamber 2, it is lined withacidproof brickwork.' A safety valve 2 arranged on the casing 2 o ensautomatically when the pressure of t e said steam rises too high. Thesteam generated in the casing passes through the outlet 2d and entersthe dust separator 3 where it meets with the baille plate 3a so that'the direction of the steam is changed and 4o the coarser cokedust isthereby caused to fall down to the bottom ofthe separator 3. From thesaid separator the steam after having passed 1a check valve 4 enters acolumn lter .5 filled .with suitable material 5, where the iine dustwill be' retained. The steam thus es' temperature drop of 190o to 160 C.should exist -between the. inlet and outlet ends. ofv

.pheres In this manner, a pressure is built the heating tubes 6a. Withthis temperature drop, it is possible to extract the heat from thequench steam by means of a relatively small heating surface and tocondense the said steam to water at 160 C. while producing the steam of5 to 6 atmospheresl pressure in the boiler 6. The last mentioned steamcontains no acid and no gases and can be utilized for driving a steamengine or for any other purpose.

The water of condensation to ether with air and wateras Hows from t etubes 6 through a pipe to a heat exchanger or feed .water heater 8 inwhich the'y feed water is heated by the hot water of condensationpassing t rough the tubes 8. The heat exchanger or feed heater 8 isessential] positioned as shown in the drawing, t at is below the steamgenerator 6, and the said exchanger or hea-ter 8 must also have theinletof the pipe 7 positioned at the bottom and the overflow 8 at the tothese conditions being necessary `in or er to obtain a hydrostatichead-in the exchanger or heater 8 opposing the pressure in the cokequenching casing 2.

The desired temperature drop from 190 C. to 160 C. in the tubes 6a isobtained by providing an adjustable pressure-maintaining device at oneend of the plant, the said device consistin of an adjustably loadedrelease valve 8b w ich allows the escape of air and water gas from theexchanger or heater 8, and of a water or condensed-steam chamber 9 whichcommunicates with the to of the exchanger or heater 8 by the aforesaidoverflow 8. The water chamber 9 also communicates at the bottom with awater pipe leading to a discharge channel 10, the communication betweenthe chamber 9 and channel 10 being controlled by a valve 9 which isopened and closed in accordance with the water level in the chamber 9 bya ioat as shown.

In the plant described, the release valve 8b is set so as to open andlet oif air and water gas only when the pressure in the exchanger orheater 8 rises above. 12 atmosup in the coke quenching casing 2, and,furthermore, the water of condensation flows ast the valve 9a when thesame is raised by 1ts float, the water from the chamber 9 ascending theaforesaid water pipe to the channel 10 under the action of the 12atmospheres pressure existing in the top portion of. the chamber 9 incommon with the top of the exchanger or heater 8.

What I claim is A plant for generating pure steam at a pressure aboveatmospheric by quenching glowing coke comprising, in combination, agas-tight quenching receptacle for the coke, means for admitting Waterto the coke in the receptacle to produce steam and Watergas and othervapours under pressure, a steam boiler, iue means for said boiler incommunication with the quenching receptacle whereby the heat in thevapours obtained from the quenching receptacle is directly absorbed togenerate the pure steam at super-atmospheric pressure, a heat eX-changer, means for passing condensed steam and water gas and othervapours from the fiue means of said boiler to the bottom of said, heatexchanger, release valve means on the top of said heat exchanger topermit the escape of-,Water gas and other uncondensed vapours at apre-arranged pressure, overflow means at the top of said heat exchangerfor Water of condensation, means for supporting said heat exchangerbelow said boiler to obtain a hydrostatic head in said exchangeropposing and consequently enabling the building up of a pressure in thecolte quenching receptacle, a Water chamber into which the overiow meansfrom said heat exchanger leads, and Hout-operated valve means,controlling the escape of water from said chamber in accordance withthe varying Water level therein.

In testimony `whereof I have signed my 4name to this specification.

OSWALD HELLER.

